Fstreams C++

Question

Hello
I want the ofstream to write at the end of a file without erasing its content inside.
how can i do it? (i'm talking about txt files,and C++)
Thanks.

Answer 1

You can pass the flag ios::app when opening the file:

ofstream ofs("filename", ios::app);

Answer 2

Use ios::app as the file mode.

Answer 3

You want to append to the file. Use ios::app as the file mode when creating the ofstream.

Appending will automatically seek to the end of the file.

Answer 4

you can also manually move the pointer once the file is open using seekp()